Part-load Performance Prediction of Turbocharged Engines

Engine simulation programs presently include the simulation of the engine together with its manifolds and the turbocharger. Most of the existing engine simulation models are based on measured turbocharger performance maps. Usually, these maps cover only a limited operating range. Therefore, they cannot be used to simulate the turbocharger performance at every engine rotational speed and are unable to adequately model part-load performance which in passenger cars prevails throughout most of engine operating life.